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Quercus macrocarpa

Quercus macrocarpa Michx.


Bur Oak, Blue Oak, Mossy-overcup Oak, Scrub Oak

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderFagalesBirch, she-oak, beech, walnut, bayberry, others
FamilyFagaceaeBeech familhy
GenusQuercusLatin for “oak”
Speciesmacrocarpa“With large fruits or seed pods”

About plant names...

Bur oaks are natives of North America.

Identification: This oak reaches 70-80' (21-24 m) in height, sometimes up to 100' (30 m). It is very drought-resistant. It prefers limestone soils. Leaves are usually about 6" (13 cm) long, sometimes up to 15" (38 cm), and very deeply divided. They are yellow-brown in the fall. This species has the largest acorns of any oak, 1-1½" (2.5-3.8 cm) long, half covered by the cap, which has a hairy or mossy fringe. See the Quercus comparison table.

Online References:

Quercus macrocarpa at the USDA Forest Service's Silvics of North America site

Quercus macrocarpa at the University of Connecticut Plant Database

Quercus macrocarpa on Wikipedia

Quercus macrocarpa at the Ohio State University PLANTFacts database

Quercus macrocarpa on Plants for a Future, a resource and information centre for edible and otherwise useful plants

Quercus macrocarpa at the Lady Bird Johnson Wildflower Center

Quercus macrocarpa at the Virginia Tech Department of Forest Resources and Environmental Conservation

Quercus macrocarpa on the USDA Forest Service's Fire Effects Information Database

Quercus macrocarpa at the University of Florida Institute of Food and Agricultural Sciences

Quercus macrocarpa on eFloras


Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, p. 209

Quercus macrocarpa description by Thomas H. Kent, last updated 2 Jan 2019.

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Quercus macrocarpa (Bur Oak, Blue Oak, Mossy-overcup Oak, Scrub Oak)

9/7/2010 · Tower Hill Botanic Garden, Boylston, MA
≈ 31 × 46" (78 × 117 cm)

Quercus macrocarpa (Bur Oak, Blue Oak, Mossy-overcup Oak, Scrub Oak)

5/22/2010 · Garden in the Woods, Framingham, MA
≈ 17 × 12" (44 × 29 cm)

Quercus macrocarpa (Bur Oak, Blue Oak, Mossy-overcup Oak, Scrub Oak)



About this map...